Glass-pressing machine



Aug. 14, 1928. 1,680,474

' K. E. PEILER ET AL GLASS PRESSING MACHINE Filed Aug. .10. 1918 '7 Sheets-Sheet 2 fizz/5725025: fl zaizess: l/fariifi z'kr Edward 16 1507022 Aug. 14, 1928. 1,680,474

K. E. PEILER 'ET AL GLASS PRESSING MACHINE Filed Aug. 10. 1918 7 Sheets-Sheet 3 J Aug. 14, 1928. 1,680,474

K. E. PEILER ET AL GLASS PRESSING MACHINE Filed Aug. 10. 1918 '7 Sheets-Sheet Fly 6. F99.

E y/0Q 94 9/ Edward 1220/6/22: @y W. 14%;.

Aug. 14, 1928. l 680,474

K. E. PEILER ET AL GLASS PRESSING MACHINE Filed Aug. 10. 1918 '7 Sheets-Sheet 6 Aug. 14, 1928. I 1,680,474

K. E. PEILER ET AL GLASS PRESSING MACHINE W257? 55 Def/62260219: {K ffarZ E Pez'Zer Edward A. Lore/22;

79% W gg otherwiseget out of correct relation.

Patented Aug. 14, 1928.

- UNITED STATES PATENT OFFICE.

KARL PEILER AND EDWARD H. LORENZ, OF WEST HARTFORD, CONNECTICUT, AS- SIGNORS TO HARTFORD-EMPIRE GOM PANY, OF HARTFORD, CONNECTICUT, A COB- PORATION OF DELAWARE.

eLass-rranssme MACHINE.

Application filed August 10, 1918. Serial No. 249,244.

This invention relates to the operating and controlling mechanisms of machines for shaping plastic substances such for instance as molten glass, and more particularly to those machines which are composed of two or more units so organized and combined that from the same driving means they'may be operated coordinately or operated independently, and if desired may be supplied from the same source of material to be shaped.

The object of the invention is to provide a relatively simple organization of coacting power transmission and interacting controlling mechanisms for machines of this .class, whereby the units, each comprising a mold table with its rotating and locking mechanisms, and their cooperating shaping mechanism may be operated coincidently in exact coordination, from a common drive, or the actuating mechanisms of each unit may,

without interfering with the operating of the other unit, be stopped or .put in action manually whenever desired. and will be stopped automatically if any of the parts fail to act in correct time, or misfeed, oAr further object is to provide means whereby the time of the movements of the shaping means may be altered without stopping the machine and its production. In the shaping of glassware it is highly desirable to keep the machine in regular operation so as to maintain uniform heat conditions in the molten glass supply, and in the molds, plungers and other shaping implements.

The invention is herein shown and de- 1 scribed as embodied in a glass pressing machine, but it may also be applied to machines for blowing, or pressing and blowing glass- YHIQ.

Figure 1 of the accompanying drawings shows a front view of a machine which embodies this in ention, with the mold table on the right in position of rest and the mold ring and pressing plunger clown, and with the plunger and mold ring on the left up and the table partly turned.

Fig. 2 shows a plan view of the machine. Fig. 3 shows on larger scale a plan of the partsv underneath thev table of the unit on the right. i

Fig.- 4 is a vertical section-taken on line H Qf Fig.3, showingthe prank for irncylinder and its valve casing, on line 7 of Fig. 2. with the valve down so the pressure intake is open to the bottom ofcylinder and the piston forced up.

Fig. 8 is a similar section showing the valve up so the pressure intake is open to the top of cylinder and the piston forced down. i

Fig. 9 is a like view showing the valve in intermediate or relief position and the piston down.

Fig. 10 shows the relation of the valve ac tuating cam and lever when the valve is in .tluposition shown in Figl 7.

Fig. 11 shows the position of the cam and lever when the valve is in the position shown in Fig. 8.

Fig. 12 shows the sponding to the valve position of Fig. 9.

Fig. 13 is asection on line 1313 of Fig. 3, through the valve-cam and its adjusting means.

Fig. 14 is a sectional view taken on line 1414 of Fig. 13-, showing the cam adjustment.

' Figs. 15 to 22 inclusive illustrate diagram matically in different positions the mechanism for operating and interlocking the table rotator crank and the lock bolt.

Fig. 15, a plan, and Fig. 16, an elevation, show the mechanisms as in normal operation, with lock bolt engaged with table ,and the rotator crank down and turning into position to move the table at the proper time. f i

Fig. 17, a plan, and Fig. '18,an elevation, show the mechanisms in normal operation, with the lock bolt disengaged from the table and the rotator crank up in engagement with and rotating the table. Fig. 19, a plan, and F g- 29. an'e e atien cam and lever correthe show the positions of the mechanisms when the normal operation of the unit is stopped by hand, the lock bolt being held withdrawn from the table by a hand lever, and an interlock preventing the rotator crank from rising and engaging the table.

Fig. 21, a plan, and Fig. 22, an elevation, show the positions of the parts when the table is out of time, so that the lock bolt cannot rise, the interlock automatically preventing the rotator crank from rising and en a ing the table until it is released by the loc bolt entering an index hole in the table. Fig. 23 is a plan view in section taken on line 2323 of Fig. 24. F ig. 24 is a side view in section taken on the line 2424 of Fig. 6.

Table rotating mechamts-m-In the machine illustrated there are two similar mold tables 23 carrying shaping molds 24, Fig. 2. These tables are rotatably supported on standards 25 mounted on thebed 26, Fig. 1. On the underside of each table are annularly arranged indexing blocks 27, with radially extending passa cs 28 between them, Figs. 1, 3, equalling t e number of molds on the table. Beneath each table and fixed on a vertical shaft 30 is a rotator crank 31 on the outer end of which is a roll 32. As the crank is revolved the roll on its end passes successively into and out of the passages 28 between indexing blocks secured on the underside of the table and thus intermittently rotates the table with a step-by-step movement, Fig. 3. On the lower end of the crankshaft is a worm wheel 33 engaging with which is a worm 34 on the driving shaft 35 that extends horizontally across the machine at the back above the bed, and that on one end has a drive pulley 36, 3. A similar worm on the same shaft drives the rotator crank for the other table.

The crank shaft has a vertical movement in its support and in the hub of the worm wheel,so t e crank may be raised and lowered, Fig. 4, carrying its roll 32 into and out of the plane of thepassages 28. On the crankshaft is a grooved collar that is en aged by the ends of a yoke 41. This yoke is eyed V to a rock shaft 42 that extends horizontally near the back of themachine above the drive shaft. On the rock shaft 42 is a. cam arm 43 carrying aroll 44 which is designed to be engaged by a cam 45 on the cam shaft 46 that extends horizontally below the table back of its center. The rock shaft has an arm 47 that is drawn by a s ring 48 in such manner that the roll 44 is, w en the machine is in normal operation, held up against the cam 45, Fig. 5. The cam shaft is driven by a bevel gear 49 that meshes with a bevel gear 50 connected with the worm wheel on the crank shaft, Fig. 4. By this mechanism.

the table rotator crank 31 is constantly revolved and in the normal operation of the machine is raised and lowered at each revolution, sufliciently to carry the roll 32 into and out of the plane of the passages 28.

Table Zoclc.-Each table has a circle of index holes 53, equal in number to the stopping stations of the table; and beneath each table is a lock bolt 54 with its upper end adapted to engage the index holes, as they reac 1 a proper position, by the upward pressure of the sprin 55, Fig. 5. The ends of a yoke 56 enga e the grooved collar 57 on the lower end 0 the lock bolt. This yoke is fastened to a rock shaft 58 which extends horizontally near the bed of the machine, Fig. 5. Fastened to the end of this rock shaft near the axis of the table, is a lever 60 with a roll 61 that is adapted to be engaged by a cam 62 on the cam shaft 46, Figs. 3 and 5. The spring tends to raise the lock bolt, and the cam 62, lever and yoke 56 draw the lock bolt down at the proper time.

The lock bolt may be held out of operation when desired, by means of a hand lever 63 loosely mounted on the rock shaft 58, which extends forward to the front of the machine. On this lever is a lug 64 that extends over a part of the yoke 56. When the handle is manually pushed down this lug engages and forces the yoke down so as to draw the lock bolt down below the table, Fig. 5. The bandle may be retained in this position so as to latch the lock bolt down by en aging the handle under a shoulder 65 on t e edge of the bracket 66,'Figs. 1 and 5.

Interlocking devices between the lock bolt and the rotator mechanism are provided. Turning loosely on the rock shaft 58 is a rocker' 68. Fixed on the rock shaft 42 in line with the rocker 68 is a finger 69, Figs. 3, 5. This finger rocks with the shaft 42 p and the rocker 68 is engaged and rocked downward by an overlying end of a. lever ,70 fixed on the rock shaft 58. (Fig. 5.) If the table is in correct time relation to the other mechanisms, that is, so that the upper end of the lock bolt can enter an index hole and lock the table, the end of the rocker 68 will clear the end of the finger 69, Figs. 16 and 18. Under these conditions the crankshaft can rise so that the rotator crank will engage and move the table. On the other hand, if the lock bolt is held down by the hand lever, the end of the rocker 68 remains in the path of the end of the finger 69 and holds the parts so that the crankshaft cannot rise high enough for the crank to engage and turn the table, Fig. 20. Should the table be out of time, or should the lock bolt be allowed to rise by the lifting of the handle at a time when the up er end of the lock bolt could not enter an in ex hole inthe table, the end of the rocker 68 will enge the end' of the finger 69 and hold the crank down,.Fig. 22. In other words, unless the parts are so timed and positioned that r the lock bolt can enter an index hole in the table, the rocker is in position to obstruct the finger, which action interlocks the parts and holds the crank down in a-position where it cannot rotate the table. The rocker 68 is eounterweighted at 67, or provided with a suitable spring to cause its end to rise into the pathway of the finger 69.

, Phmger operating mechanism.Each plunger 73 is mounted in the usual manner upon the lower end of a piston rod 74, Fig. 1. Each piston 75 (see Fig. 7) works up and down in a cylinder 76 formed in the cross head 77 that is supported on posts 78 which rise through the centers of the tables. Each cylinder on one side has a" valve casing 79 with a port 80 to the upper end of thecylinder, a port 81 to the lower end of the cylinder, an exhaust outlet 82 near its upper end and an exhaust outlet 83 near its lowerend. There is also a port 84 opening through one side of the valve easing into a relief valve 85. An intake 86 for the entrance of the pressure fluid which reciprocates the plunger piston is made through one side near the middle of the valve casing. A plunger valve 87 is movable up and down in each valve casing, being normally lifted by a sprin 88 in the lower partof the casing, Figs. 7, 8, 9. 7

The valve, at the proper time, is forced down by a rocker head 89 pivoted on a bracket 90 mounted on the cross head, Fig. 2. The rocker head is connected with a rod 92 that extends downward and has its lower end jointed to an arm 93 (Figs. 3 and 6) fastened to a rock shaft 94 which extends horizontally beneath the table. Fastened to this shaft 1s a lever 95 provided with a roll 96 that is engaged by a cam 97 on the cam shaft 46, Fig. 6. This cam, operating through these connections, forces the valve down at the proper time to exhaust above the piston and admit the operatin fluid to the underside of the piston for lifting the plunger Fig. 7, and it allows the valve to be lifted by its spring at the proper time to exhaust below the piston and admit fluid pressure to the top of the cylinder above the piston for forcing the plunger down, Fig. 8. Interlocking devices are provided between the plunger operating and lock bolt mechanisms to prevent the operation of the plunger valves to move the plungers down, excepting when the table is locked by the locking bolt. The cam arm 60 for the looking bolt and the cam arm 95 for moving the plunger valves ar provided with interlockmg dogs 01' bosses 59 and 98, respectively Figs. 23 and 24. As herein illustrated the studs on which the cam rolls 61 and 96 are mounted are extended past each other and flattened for engagement with each other (Fig. 6). If the locking bolt should fail to ficiently set.

inlet tions from the cam 97.

rise, as shown in Fig. 18 or Fig. 22, the cam arm 60 will be held in its outward position, not being allowed to follow its cam. In this position its dog 59 will engage with the dog 98 of the cam arm 95, thus preventing that arm from following its cam, and thereby preventing the plunger valve from being pushed up to the position shown in Fig. 8, in which it admits the piston 75 down.

The relief valve 85 is employed for controlling the extent to which the downward pressure on the plunger 73 is reduced after pressing the ware into shape. It is desirable thus to reduce the pressure at this time, to avoid overstraining the glass while it is setting. On the other hand, it is desirable to hold the plunger in place in the ware while the glass is setting, so as to preserve its form until fully set. This setting period varies with the size, and especially with the thickness of the ware, and also with the composition of the glass, some of which set quicker than others. If the pressure on the piston 75 were to be released altogether, the piston and upwardly by the action of the springs 72, which are commonly employed for. holding the mold ring 71 down uponthe molds. Therefore, after the article is fully shaped, the pressure above the piston is reduced to a degree only sufiicient to overcome the pressure of the springs 72, by moving the valve 87 down to the position shown in Fig. 9, which opens a port from the passage 80 through the outlet 84 to the relief valve 85, without opening the passage to the exhaust outlet 82. The relief valve 85, which may be of any well-known construction, is adjusted so as to retain the pressure to the degrec necessary to overcome the mold ring springs 72, thus holding the plunger 73 in its pressing position, with little or no pressure upon the ware until the latter is suf- Then the valve 87 is moved do vnwardly' to the position shown in Fig. 7, opening the exhaust outlet 82 and the lower port 81,thereby raising the piston and the plunger to their upper positions.

Means are provided for manually withdrawing-the control of the plunger opera- A lever 91 is loosely mounted upon the shaft 94, Figs. 3, 10, 11, 12 and' 24, having a pin or other offset portioIL 99 extending behind the cam arm 95.

The lever 91 extends forwardly to a position within ponvenient reach of the operator, and a catch 111 is provided at any convenient position for holding the lever 91 in its raised position, when desired. By raising this lever the arm" 95 is. withdrawn beyond the reac-h'o f'the cam 97, moving the valve 87 to its lowest'pesition, and :thus raising the plunger if these parts are.

73 tdits highest position, not already in those positions. By these air for pushing the plunger would be pushed forwardly or means the plunger can be held out of operation, without stopping the other mechanisms. Pl'u/nger 0mm adjustment.-The plunger cam 97 for controllin the movements of the plunger valve 87 is shown as being made of three parts, two of which are adjustable with relation to the third part, so as to determine and vary the times of the valve movements. The part 100 is fixed on the cam shaft 46, and the part 101 is fastened to the part 100 by bolts 102, extending through slots 103, Figs. 13, 14. By adjusting the part 101 backwardly on the part 100, the time at which the valve 87 is moved to the relief position shown in Fig. 9 may be varied. The part 104 is loosely mounted on the cam shaft 46 and is adjusted forwardly or backwardly to vary the time at which the valve 87 is moved from the relief position of Fig. 9 to its lower position of Fig. 7, to raise the plunger 73. This adjustment of the cam 104 is made by the operator as re quired from time to time, without stopping the machine. The hub portion of the cam part 104 is provided with cams 107, which engagewith corresponding cams 109 of a' collar 108, which is splined for endwise movement on the cam shaft 46, Figs. 3, 13, 14. A spring 110 coiled about the hub of the cam 100 engages a stud 105, which projects through a slot 106 of the cam part 100,

this spring tending to move the cam part 104 backwardly relative to its direction of rotaton as far as may be permitted by the position of the cams 107, 109. Endwise movement" of the collar 108 with its cams 109, and the corresponding action of the spring 110, serve to adjust the cam part 104 forwardly or backwardly so as to correspondingly advance or retard the time at which the valve 87 is moved from its relief position of Fig. 9 to its plunger raising posit-ion of Fig. 7.

The collar 108 is thus moved endwise by means of a sleeve 112 provided with a rack 113, which is engaged by a pinion 114, Figs. 3 and 13, keyed to the shaft. 115, whichhas fixed upon it a segmental rack 116, which is engaged by a pinion 117 on an arbor 118, provided with a handle 119, Figs. 1 and 3, located within easy reach of the operator. By turning this arbor the collar 108 can be pushed toward or retracted from the cam part 104, thus advancing or retarding the latter and thereby shortening or -lenghtening l the period during which the plunger remains in the ware, without interrupting the operations of the machine to make the adjustment. Suitable means, such as' a clamp screw 120 may be employed for holding the adjusting pa s in their adjusted positions.

Table rotating anal plunger recigwocating interlocking wwclzam'sm.-Interlocking devices are arranged between the piston rods' and lthe table rotating mechan m 5 that vented from rotating the table.

if a plunger should fail to rise the rotating mechanism for the table with which that plunger operates, will be held inoperative. Bods 122, mounted to move vertically in front of the machine, are connected by springs 123 and collars 124 and arms 125 that are attached to the piston rods 74, so as to move up and down with the piston rods, Fig. 1. Near its lower end each rod 122 carrles two dogs 126 and 127, Fig. 6. l-iounted to turn on a stud 128 fixed in a bracket 129 fastened on a post 130 is a bell crank lever 131, the lower end of which acts as a latch 132, Fig. 6. A spring 133 is arranged to draw the front end of the bell crank lever down and hold the latch over a dog 134 attached to the treadle bar 135. As the piston moves to its upper position the upper dog 126 engages a pin 136 and lifts that end of the lever so that the latch 132 will be carried away from the dog 134, and allow the treadle to rise.

If, however, the plunger should fail to rise, the latch would not be withdrawn, but would hold the treadle down and thus hold the rotator crank out of engagement with the table. The rear end of the treadle 135 is loosely pivoted on the rocker shaft 58 and has an arm 137 connected by a link 138 with an arm 139, which is fixed upon the rock shaft 42, Fig. 6. By means of these connections with the rock shaft 42, the treadle is raised and lowered by the table rotator cam 45, and in its lowest position is momentarily latched by the latch 132, as above described. Thus, if the plunger should adhere to the glass, or for any reason does not rise, the treadle remains latched in its downward position, thereby holding the table r0- tator crank down so that it will not rotate the table until the treadle 135 is again released by the rising of the plunger 73 and its piston 74.

The rotator crank can also be held down, out of engagement with the table at the will of the operator, by means of a manually operated handle 142 and latch 141, which are pivotally mounted on the stud 128. The lower end of this latch is de=igned to engage a dog 143 on the treadle, Figs. 3, 6. By pulling the handle forward and swinging the lower end of the latch backward so that'it will on age with the dog 143 the treadle may be hel down, and through the connecting parts the rotator. crank held down. and pre- A spring detent 140 Figs. 3, 6 maybe used for retaining the latch 141 in either or both of its positions.

A further safet provision is also made for withdrawing t e rotator crank from engaging relation with the table if for any reason, such as failure of the air supply, the plun er should descend while the crank is was: Thelower d g 127 n the rod 12 engages a pin 144 rojecting from the treadle 135 and operates t rough its connections with the rotator crank, already described, to

should be latched out of operation by the move-the crankto its lower position.

Operati0n.1n the normal operation of the machine herein described the two mold tables are intermittently advanced by alternate movements, the charges of glass being fed to the molds at one station, and then pressed by the plunger at a succeeding station, as is customary in intermittent machines.

For convenience in adjusting the molds, plungers and other parts to each other, before starting the machine, the rotator cranks latches 141, holding the treadles 135 at their lowered position. By withdrawing the locking bolts 54 by the levers 63, the tables can be turned by hand from station to station, and the plungers let down at the various stations, for aligning the molds to them. The interlocking devices (Figs. 23, 24) between the locking bolts and the plunger mechanisms, prevent the plunger from being brought down, excepting when the tables are locked at their stations. In starting the machines, the plungers are preferably held out of operation by latching the levers 91 in their upper position, until after the tables have been started and regular feeding of the charges of glass has been established.

During operation, the plungers may be put out of operation, without stopping the tables, by latching the levers 91 in their up per position. To stop, the table rotations, and

ock them at their respective stations,

the treadles 135 are latched down by the latches 141, thus withdrawing the rotator cranks below their plane of engagement with the table. To stop the tables and at the same time leave them free to be turned by hand, the levers 63 are latched down, this serving also to hold down the rotator cranks and hold the plungers out of operation.

Either of the table mechanisms may thus be stopped, wholly or in part, without stopping or interfering with the normal operation and production of the companion table. Various well-known constructions, arrange- 'ments and modifications of the parts may be employed, such details being adapted to various requirements by the expected skill of the designers and mechanics familiar The constructions and artransposedand otherwise modified and adapted to suit the sizeor form or other char :teristics of the. ware to be made, or

to suit other conditions and requirements of tions.

' 7. A machine for shaping plastic glass,

comprising a rotatable mold table, ashaping' implement, a revoluble and reciprocatory crank for imparting to the table intermit tent rotary movements, into cooperative relation to said implement, mechanism for revolving the crank, and mechanism for reciprocating the crank.

2. A machine for shaping plastic glass, comprising a rotatable mold table, a shaping implement, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, into cooperative relation to said implement, mechanism for revolving the crank, mechanism for reciprocating the crank, and means for locking the table between its movements.

3. A machine for shaping plastic glass, comprising a rotatable mold table, a shaping implement, a revoluble and reciprocatory crank .for imparting to the table intermittent rotary movements, into cooperative relation to said implement, mechanism for revolving the crank, mechanism for reciprocating the crank, and means for controlling the reciprocating movements of the crank to permit or to interruptits table rotating Iunction."-

4. A machine for shaping plastic'glass, comprising a rotatable mold table, a shaping implement, a revoluble and reciprocatory crank for imparting to the table intermittent, rotary movements, into and out of cooperative relation to said implement, mechanism for revolving the crank, mechaamsm for reciproating the crank, means for looking the table between its movements, and

means controlling the reciprocating movements of the crank to permit or to interrupt its table rotating function.

5. A machine for shaping plastic glass, comprising a rotatable mold table, a shaping 1 implement, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, into and out of cooperative relation to said implement, mech-, anism for revolving the crank, mechanism for 10 reciprocating the crank, means for locking the table between its movements, and means actuated with said locking means for controlling the crank recip rocations, to interrupt its table rotating function.

6. A machine for shaping plastic glass, comprising a rotatable mold table, a shaping implement, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, into and out of co- 1 operative relation to said implement, mechanism for revolving the crank, mechanism for reciprocating the crank, means for locking the table between its movements, and means for holding the "crank reciprocating 125 and table locking means in inactive posi-- comprising a rotatable mold table, a shaping implement, a revoluble 'and reciprocatory 1 30 volving the crank,

crank for imparting to the table intermittent rotary movements, mechanismfor remechanism for reciprocating the crank, means for-locking the table between its movements, and co-acting means for holding the crank reciprocating means and table locking means ininactive positions.

8. A machine for shaping plastic glass, comprising a rotatable mold table, a shaping implement, a revoluble and reciprocatory crank for imparting to the'table intermittent rotary movements, into and out of cooperative relation'to said implement, mechanism for revolving the crank, mechanism for reciprocating the crank, means for locking the table between its movements, means for holding said locking means inactive, and means connected with said locking means for obstructing the operation of said crank reciprocating means when said locking means is held inactive. 9. A machine for shaping plastic glass,

comprising a rotatable mold table, a shaping lmplement, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, into and out of cooperative relation to said implement, mechanism for revolving the crank, and mecha nism for reciprocating the crank into and out of engaging relation with the table, during the rotation of the crank.

10. A machine for shaping plastic glass, comprising arotatable mold table, a shaping element, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, into and out of cooperative relation to said implement, mechanism for revolving the crank, mechanism for maprocating the crank, a treadle connected with the crank reciprocating means, and means for latching said treadle and rendering said reciprocating means inactive.

11. A machine for pressing plastic glass,

comprising a rotatable mold table, a plu-- rality of molds carried thereby, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, mechanism for revolving the crank, mechanism for reciprocatingthe crank, a pressing plunger, and means for reciprocating the plunger toward and from the molds in time with the crank movements.

12. A machine for pressing plastic glass, comprising a rotatable mold table, a plurality of molds carried thereby, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, mechanism for revolving the crank, mechaanism for reciprocating the crank, a pressing plunger, means for reciprocating the plunger toward and from the molds in time with the crank movements, and means-for varying the time ofthe movements of the plunger relative to the crank movements.

13. A machine for pressing plastic lass, comprising a rotatable mold table, a p urality of molds carried thereby, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, mechanism for revolving the crank, mechanism for reciprocating the crank, a pressing plunger, means for reciprocating the plunger toward and from the molds in time with the crank movements, and means for varying the time relation of the crank and plunger movements during said movements.

14. A machine for pressing plastic glass, comprising a rotatable mold table, a plurality of molds carried thereby, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, mechanism for rotating the crank, mechanism for reciprocating the crank, a pressing plunger, means for reci rocating the plunger in time with the cran movements and adjustable means for varying the periods of dwell of the plunger.

15. In a glass pressing machine the combination with a plunger, and its reciprocating means, of a sectional cam to control said reciprocating means, and means for effecting relative adjustment of the cam sections during the operation of the machine.

16. In a glass pressing machine the combination with a mold, a plunger, and means for reciprocating the plunger into and out of the mold, of a cam to control the reciprocations of the plunger, rotating shaft driving the cam, and means operable while the shaft is rotating for varying the angular relation between the shaft and the cam whereby the period of dwell of the plunger in the mold is varied.

17. A machine for pressing lastic glass, comprising a rotatable mold ta 1e, a plurality ofmolds carried thereby, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, mechanism for revolving the crank, mechanism for reciprocating the crank, a prefising plunger, means for reciprocating the plunger toward and from'the molds, and interlocking means between the plunger and crank reciprocating mechanism whereby the operation of the crank reciprocating mechanism depends upon the correct operation of the plunger reciprocating means.

18. A machine for pressing plastic glass, comprising a rotatable mold table, a plurality of molds carried thereby, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, mechanism for revolving the crank, mechanism for reciprocating the crank, av pressing plunger, means for reciprocating the plunger toward and from the molds, means for varying the time of the movements of the plunger, and means interposed between the plunger and the crank reciprocating mechanism to render the latter inoperative if the plunger fails to rise.

19. A machine for pressing plastic glass,

comprising a rotatable mold table, a plural-- ity of molds carried thereby, a revoluble and reciprocatory crank for imparting to the table intermittent rotary movements, mechanism for revolving the crank, mechanism for reciprocating the crank, a pressing plunger, means for reciprocating the plunger towards and from the table, means operable during the movements of the plunger for varying the times of such movements, andmeans interposed between the plunger and the crank reciprocating mechanism'for rendering the crank reciprocating mechanism inoperative if the plunger fails to rise.

20. The combination with the pressing plunger, piston, cylinder and valve of a machine for pressing plastic glass, of steam composed of relatively adjustable sections, means movable longitudinally of the cam axis for rotating one cam section relatively to the other section, mechanism for moving said cam rotating. means, and connecting mechanism between said cam and said valve.

21. In a glass pressing machine, the combination of a support, a plurality of molds carried thereby, a pressing plunger, a crank for moving said support to successively align said molds with said plunger, means for actuating said plunger to press glass in said molds, and means for shifting said crank into and out of driving relation to said support, including safety means operable by abnormal operation of the machine, for holding said crank out of said driving relation.

22. In a machine fonworking plastic glass, the combination of a press plunger, alurality of molds, a support for said mol s, a crank for moving the support and molds into cooperative relation to said plunger, means for revolving the crank, means for reciprocating the crank into and out of engaging relation to the support, and means for moving the plunger toward and away from said molds when said molds are-in cooperative relation thereto. I

23. In a glass pressing machine, the combination of a support, a plurality of molds carried thereby, a pressing plunger, a revolving crank for moving said support to succes-- sively align said molds with said plunger,

. means for actuating said plunger to press glass in said molds, and means for shifting said crank in an axial direction into and out of driving relation to said support, ,includ ing safety means operable by abnormal operation of the machine, for holding said crank out of said driving relation.

24. In a machine for workin plastic glass, the combination of a press plunger, a Inrality of molds, a support for said mol s, a

crank for moving the said support and molds in cooperative relation to said plunger, means for revolving the crank, means for reciprocating the crank into and out of its support moving position, means for locking the support and molds when in cooperative relation to said plunger, and means for moving the plunger toward and away from said molds when said molds are in cooperative relation thereto.

25. In a machine for working plastic glass, thecombination of a press plunger, a plurality of molds, a'movable support for said molds, means for moving said plunger toward and away from said molds when the molds are in alignment therewith, means for locking the support and molds against movement when in alignment with said plunger, a revolvable and reciprocatory crank for. moving said support and molds, mechanism for revolving the crank, mechanism for reciprocating the crank longitudinally of its axis of rotation to move it into and out of support moving position, and means for holding the crank reciprocating and table locking means in inactive position.

26. In a glass pressing machine, the combination of a horizontally movable support, a plurality of molds carried thereby, a pressing plunger, means for moving said support to consecutively align said molds with said plunger, means for shifting said supportmoving means vertically into and out of operative relation to said support, and safety: trip mechanism for rendering said shifting means inactive, when said moving means occupies an inoperative position, to discontinue the" movement of said support in the event of the abnormal operation of said machine;

27. In a glass pressing machine, the combination of a support, a plurality of molds carried thereby, a pressing plunger, means for moving said support to consecutively align said molds with said plunger, means for shifting said support moving means in a direction transverse to the plane of the support, into and out of operative relation to said support, and safety trip mechanism for rendering said shifting means inactive when said moving means occupies an inoperative position, to discontinue the movement of said support in the event of the abnormal operation of said machine.

28. In a glass pressing machine, the combination of a support, a plurality of molds harried thereby, a pressing plunger, a continuously rotating crank for moving said during another portion of the same rotation, and a safety trip mechanism operable in the event of the abnormal operation of said machine, for rendering said shifting means inactive to cause said crank to rotate out of engagement with said support. I

29 In a machine for shaping plastic glass, the combination of molds, a rotatable mold support, means adapted to cooperate with said molds to shape the glass therein, a crank for intermittently rotating said support to successively move said molds into operative position relative to said shaping means, means timed to lock the support between its periods of rotation, a rocker device adapted to intermittently move said crank into operative relation to the support, means ing support,

for actuating the rocker device, and means controlled by the locking means, serving when the support is out of normal relation to the locking means to prevent operation of said rocker device.

30. In a machine for shaping plastic glass, the combination of a rotatable mold support, a plurality of molds carried by said sup ort, means cooperating with said molds for s aping the glass therein, a crank for intermittently rotating said support to successively position said molds in alignment with said shaping means, means timed to lock the support between its periods of rotation, a rocker device adapted to intermittently move said crank into operative relation to said support, means for actuating the rocker device, an arm on the rocker device, and means controlled by the locking means serving when the support is out of normal relation to the rotating means to engage said arm and prevent operation of the rocker device.

31. In a machine for sha ing plastic glass, the combination of a rotata le mold support, a plurality of molds carried by said support, means cooperating with said molds for shaping the glass therein, a crank for intermittently rotating the support to successively carry saidmolds into operative position with respect to said shaping means, a rocker device for periodically moving said crank into and out of position to effect rotation of the support, means for actuating said rocker device, means timed to lock the support between its periods of rotation includin a rocker device, a laterally extending mem ber on the first mentioned rocker device, and a member controlled by the second mentioned rocker device for engaging said extension to prevent operation of the crank when the mold support and locking mechanisms are out of normal relation.

32. In a machine for shaping plastic glass, the combination of a rotatable mold carryshaping means adapted to cooperate with the molds to shape the glass therein, a crank for moving said support,

means for continuously rotating said crank,

means independent of said rotating means for alternately shifting said crank between a position in operative relation to said support and a position out of operative relation thereto during the normal 0 eration of the machine, mechanism for locking the support when said crank occupies an inoperative osition, said mechanism including a roc er device for periodically moving the locking element to release position, means for actuatingsaid rocker device, and means controlled by said rocker device adapted to prevent operation of said shifting mechanism to maintain said crank out of operative relation to said support in the event of the abnormal operation of said machine.

33. In a machine for shaping plastic glass, the combination of a rotatable mold carrying support and shaping means adapted to cooperate with the molds to shape the glass therein, means for controlling'the operation of the shaping means including a rocker device, a crank for periodically rotating said mold carrying support to bring the molds substantially in alignment with said shaping means, means for rotating said crank, means independent of said rotatin means for shifting said crank in an axial irection into and out of operative relation to said support during the normal operation of said machine, locking means for the support including a second rocker device, means operative in timed relation to said shifting means, for actuating said second rocker device to eriodically move the locking element to re ease position when said crank is shifted to an inoperative position, and interengaging members between said rocker devices, whereby theiirst named rocker device will be held in position to prevent operation of the shaping mechanism if the mold carrying support remains abnormally unlocked.

34. In a machine for shapin plastic glass, the combination of a rotatabfii mold carrying support, and shaping means adapted to cooperate with the molds to shape the glass therein, a crank for effectin intermittent rotation of the support to bring the molds substantially into alignment with the shaping mechanism, means for rotating sald crank, a rocker device for interrupting driving engagement between said crank and said support, a second rocker device, connected to and controlling the operation of said firstmentioned rocker device, a latch adapted to prevent movement of said rocker devices and said crank from engaging the mold carrying supportin the event that said shaping mechanism remains abnormally within the mold, and means actuated by the shaping mechanism when returning to ino erative position adapted to actuate said late to release the rocker devices to permit reestablishment of the driving engagement between said crank and said support;

35. In a machine for shaping plastic glass, the combination of a rotatable mold carrying support and shaping means adapted to cooperate with the molds to shape the glass therein, of means for effecting intermittent rotation of the support. to bring the molds substantially into alignment with the shaping mechanism, including a rocker device, a second rocker device, a locking device for the support controlled by said last mentioned rocker device, an operating connection between said rocker devices, a latch adapted to prevent movement of said rocker devices, whereby to prevent rotation of the mold carrying support in the event that said shaping mechanism remains abnormally within the mold, and means actuated by the shaping mechanism adapted, upon withdrawing from the mold to release said latch and thereby permit operation of the table rotating mechanism.

36. In a machine for shaping plastic glass, the combination of a rotatable mold carrying support and shaping means adapted to cooperate with the molds to shape the glass therein, a crank for effecting intermittent rotation of the support to bring the molds substantially into alignment with the shaping means, a rocker device for moving said crank to operative position, means for actuating said rocker device, a second rocker device provided with an arm connected with the first named rocker device, and means controlled by the shaping means positioned to actuate the arm, whereby to render the r0- tator mechanism inoperative in case the shaping means operates out of normal time relation to the rotator mechanism.

37. In a machine for shaping plastic glass,-

the combination of a rotatable mold carrying support and shaping means adapted to cooperate with the molds to shape the glass therein, a crank for effecting intermittent rotation of the support to bring the molds substantially into alignment with the shaping mechanism, a rocker shaft for moving said crank to operative position, means for actuating said rocker shaft, a second rocker shaft provided with an arm, a link connecting said rocker shafts, a locking device for the support controlled by the second mentioned rocker shaft, and means controlled by the shaping means positioned to actuate said arm,.whereby to render the crank inoperative in case the shaping means is operated out of normal time relation to the crank.

38. In a glass pressing machine the combination with aplunger, of pneumatic means for reciprocating said plunger, a valve mechanism for controlling the operation of said pneumatic means, a cam for actuating said valve mechanism,

for changing the period of time that said cam is in operative position with respect to said valve mechanism while the machine is in operation.

39. In a glass pressing machine the combination with a plunger, of pneumatic means for reciprocating said plunger, a valve mechanism for controlling the operation of said pneumatic means, a cam for actuating said valve mechanism, and means for varying the duration of the actuating periods of said cam while the machine is in operation.

40. In a glass pressing machine, the combination of a support, a plurality of molds carried thereby, a pressing plunger cooperating with said molds, means for moving said support to align said molds with said plunger, means for locking said support when a mold is in operative'position relative to said plunger, pneumatic means for reciprocating said plunger, a valve mecha nism for controlling the operation of said pneumatic means, a lever for actuating said valve mechanism, a cam for actuating said lever, a latch for preventing the operation of said lever when said locking means is out of engagement with said support and a stop for preventing the operation of said latch when said locking means is in engagement with said support.

41. A glass pressing machine embodying a plunger, means for reciprocating said plunger, a sectional cam for controlling the operation of said reciprocating means, and a cam for shifting the angular position of one of said cam sections relative to another section to alter the duration of the period of dwell of said plunger.

42. A glass pressing machine embodying a plunger, means for reciprocating said plunger, a sectional cam for controlling the operation ofsaid reciprocating means, a cam for shifting the angular position of one of said cam sections relative to another section to alter the duration of the period of dwell of said plunger, and means for actuating said shifting cam while the sectional cam is rotating.

43. A glass pressing machine embodying a plunger, means for reciprocating said plunger, a sectional cam for controlling the operation of said reciprocating means, and an axially movable cam for shifting the an gular position of one of said cam sections :relative to another to alter the duration of the period of dwell of said plunger.

44. A glass pressing machine embodyin a plunger, means for reciprocating sai plunger,,a sectional cam for controlling the operation of said reciprocating'means, and a cam mounted for rotation with said cam and axially movable with respect thereto for shifting the angular position of one of said and means cam sections relative to another section to alter the duration of the period of dwell of said plunger.

45. A glass pressing machine embodying a plunger, means for reciprocating said plunger, a sectional cam for controlling the operation of said reciprocating means, a cam mounted for rotation with said sectional cam and axially movable relative thereto for shifting the angular position of one of said.

cam sections relative to another to alter the duration of the period of dwell of said plunger, and means for moving said shifting cam 1n an axial direction to shift the relative positions of said cam sections while they are rotating.

46. In an automatic glass machine, the combination of pressure-operated means for shaping an article from plastic glass, devices to supply full pressure to said means until the article is shaped, and a controller for reducing said pressure and maintaining the reduced pressure constant for a predetermined interval of time after the article has been shaped.

47. In an automatic machine, the combination of pressure-operated means for shaping an article from plastic material, devices to supply full pressure to said means until the article is shaped, and a controller for automatically reducing the said pressure and maintainin the reduced pressure constant for a pre etermined interval of time after the article has been shaped and before crushing pressure is applied to the shaped article.

48. In an automatic glass machine, the combination of pressure-operated means for shapin an article from plastic glass, automatica ly operated devices to supply full pressure to said means until the article is shaped, and a controller for reducing said pressure to a predetermined degree and maintaining said reduced pressure constant for a predetermined interval of time after the article has been shaped.

49. In an automatic glass machine, the combination of pressure-operated means for shaping an article from plastic glass, devices to supply full pressure to said means until the article is shaped, a controller for reducing the said pressure when the article has been shaped, and means to hold the reduced pressure constant for a predetermined period.

50. In an automatic machine, the combination of pressure-operated means for shaping an article from plastic material, auto matically operated devices to suppl full pressure to saidmeans until the article is shaped, a controller for relieving the said pressure when the article has been shaped and before excessive pressure is applied to the shaped article, and means to hold the reduced pressure constant for a predetermined period.

51. In a machine for manufacturing articles from plastic glass, the combination of shaping devices, means to apply power to said shaping devices to cause the devices to mold plastic glass into the desired form, and a controller for said power to decrease said power a predetermined amount and maintain such decreased power constant for a predetermined interval of time after the article has been formed.

52. In a machine for manufacturing articles from plastic glass, the combination of shaping devices comprising a mold and plunger, means to apply power to said shaping devices to cause the devices to mold plastic glass into the desired form, and a controller for said power to decrease said power a fixed amount and maintain such reduced power constant for a predetermined interval of time after the article has been formed.

53. In a machine for manufacturing articles from lastic glass, the combination of shaping evices, automatically operated means to apply power to said shaping devices to cause the devices to mold plastic glass into the desired form, and a controller for reducing said ower a predetermined amount and maintaining such reduced power constant for a predetermined interval of time after the article has been formed.

54. In a machine for manufacturing articles from plastic glass, the combination of shaping devices, means to apply power to said shaping devices to cause the devices to mold plastic glass into the desired form, a controller for said power to release a portion of said power when the article has been formed, and means to maintain the remaining portion of said power constant and effective until the glass sets.

55. In a machine for forming glass articles, the combination of a mold, a plunger, pressure-operated means for causing a relative movement between said mold and said plunger to shape plastic glass into desired articles, a timer for predetermining the periodof operation of said means, and controllers operated by said timer to reduce said pressure and maintain the same at a constant degree for a predetermined interval of time and subsequently entirely release said reduced pressure.

56-. In an automatic glass machine, the combination of pressure-operated pressing means, means to apply pressure to said pressing means, devices to reduce said pressure when the forming operation is completed and maintaining a constant reduced pressure to said pressing means until the glass sets, and means for varying the duration of the period of application of said pressures.

57. In an automatic glass machine, the combination of pressure-operated pressin means, means to apply pressure to sai pressing means, devices to relieve said pressure when the forming operation is completed, constructions to hold the pressure at a constant reduced pressure head after the said. devices have operated, and means for adjusting the degree of said reduced pressure.

58. In an automatic glass machine, the combination of shaping devices, means vfor supplying power to operate said shaping decombination of shaping supplying power to operate said shaping desuccessively maintain full power during a portion of the shaping period and a constant reduced pressure during the remainder of said period.

60. In an automatic glass machine, the

devices, means for vices, means to control said power when the shaping operation is completed, and means to reduce the applied power before the article is ready to devices and maintain such constant until the glass sets.

61. In an automatic glass machine, the combination of shaping devices, means for supplying power to operate said shaping devices, means to control said power to maintain full power before the shaping operation is completed, and means to reduce the a plied power before the article is ready to he removed from said shaping devices and to maintain such reduced power constant until the glass sets.

62. In an automatic glass machine, shaping devices, means to supply air under pressure to said shaping devices to cause a shaping operation, means adapted to successively reduce the air pressure to a predetermined amount when the shaping operation is completed, to maintain such reduced pressure constant until the glass sets, andto completely relieve the air pressure in said devices when the article is ready to be removed from said devices.

KARL E. PEILER. EDWARD H. LORENZ.

be removed from said shaping 5 reduced power I 

